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Do You Need Carbs To Build Muscle?

Do You Need Carbs To Build Muscle?

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🚨 Let’s address the fear head-on…

Carbohydrates have become one of the most misunderstood—and frankly, feared—nutrients in the world of body composition.

And I get it.

If fat loss has been your focus, cutting carbs works. It lowers insulin, improves insulin sensitivity, and often unlocks fat loss that felt impossible.

But here’s the problem…

👉 The strategy that helps you lose weight is not always the strategy that helps you build muscle.

And that’s where people get stuck.

⚡ The Truth (Without the Drama)

Do you need carbs to build muscle?

👉 No.

But if your goal is to:

  • Build new muscle
  • Train harder
  • Recover faster
  • Actually look like you lift

👉 Then carbs go from “optional” to strategic.

🧠 What Your Body Actually Needs to Build Muscle

Muscle isn’t free tissue. Your body doesn’t just hand it out.

To build muscle, you need:

  • Adequate calories
  • Sufficient protein
  • A strong training stimulus
  • And most importantly… 👉 An internal environment that says: “We can afford to grow.”

Low calories + low carbs + high cardio?

That’s not a growth signal.

That’s a survival signal.

🔥 Why Carbs Matter 1. They Fuel Performance

Carbs are stored as glycogen in muscle—your high-output fuel.

More glycogen = ✔ More reps ✔ Better intensity ✔ Higher training volume ✔ Stronger contractions

Less glycogen = ❌ Earlier fatigue ❌ Lower training quality ❌ Less muscle stimulus

2. They Improve the Environment for Growth

Carbs increase insulin…

…and insulin is not the villain people think it is.

👉 It’s a transporter

It helps:

  • Drive amino acids into muscle
  • Reduce muscle breakdown
  • Support recovery
  • Create an anabolic (muscle-building) environment

Without effective insulin signaling? You can train all you want… and still lose muscle.

3. They Support mTOR Activation

Think of mTOR as the “on switch” for muscle growth.

  • Protein turns it on
  • Carbs help support and sustain it

Without carbs, you can still build muscle…

👉 But not as efficiently, and not as consistently.

4. They Prevent Muscle Breakdown

If you don’t eat carbs, your body will make glucose anyway.

How?

👉 By breaking down protein (including muscle) through gluconeogenesis

So yes…

👉 Carbs are protein-sparing

⚠️ The Low-Carb Trap

You can maintain muscle on low carbs.

But building new muscle?

That’s where it gets harder.

Why?

  • Higher cortisol (especially around training)
  • Slower recovery
  • Lower glycogen
  • Reduced training output

👉 You’re pushing your body toward survival… not growth.

💡 Let’s Talk Strategy

Carbs are not the problem.

Poor timing + poor structure = the problem.

✔ When to Use Carbs:
  • Around workouts (especially after)
  • Strategically during the day
  • Evening (in the right context) for muscle protection
❌ What NOT to Do:
  • Add carbs on top of a high-fat diet
  • Eat them randomly all day
  • Fear them… then binge them

👉 That’s how people gain fat and blame carbs.

⚖️ The Golden Rule

If carbs go up… 👉 Fat must come down

You cannot run:

  • High carb
  • AND high fat

That’s the fastest way to stall progress.

👀 What You’ll Notice When You Get This Right
  • Muscles look fuller
  • You look leaner (yes, leaner)
  • Better pumps
  • Better workouts
  • Faster recovery

👉 Flat muscle = softer look 👉 Full muscle = leaner, tighter look

🧭 Final Takeaway

Carbs are not something to fear.

👉 They’re something to respect and use properly

When they have:

  • A job to do
  • Somewhere to go (muscle)

They become one of the most powerful tools for body composition.

📣 Want Help Applying This Properly?

This is where coaching matters—because timing, structure, and individual physiology all play a role.

👉 Explore programs and coaching: www.joannelee.com

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🎧 Loved This Episode?

Make sure you: ✔ Subscribe to Midlife Mayhem ✔ Share with someone still afraid of carbs ✔ And start using food as a tool, not a fear

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